Our expert says:
According to MedicineNet.com the following side effects are noted with the use of a vacuum pump.
An erection obtained by the vacuum constriction device is not the same as an erection achieved naturally. The penis tends to be purplish in color and can be cold or numb. Other side effects can include:
A black and blue mark or small area of bruising on the shaft of the penis. This is usually painless and generally will resolve in a few days.
Decrease in the force of the ejaculation. The constriction band traps the ejaculate or semen at the time of orgasm. This is not dangerous and usually does not cause pain. The semen will usually dribble out once the constriction band is removed. Generally, this does not interfere with the pleasure of a climax or orgasm.
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